feat(memory): scope procedural memory by project

## Background

ReMe currently records conversation memory into daily notes by date and identifies each source conversation with a stable `session_id`. Different coding projects normally produce different session IDs, so the daily layer does not need to be reorganized by project. However, a session ID alone does not preserve the project context known by coding-agent hosts such as QwenPaw, Codex, and Claude Code.

Without explicit project metadata, Auto Dream extracts changed daily notes globally and may consolidate project-specific operational experience into the same procedural-memory namespace. Similar procedures from unrelated repositories can then be merged or recalled across project boundaries.

This issue follows up on #374 with a narrower scope: preserve the existing daily/session layout and add project scoping only to procedural memory.

## Proposed Changes

- Add optional project context to `auto_memory` and `auto_memory_cc`:
- `source_agent`
- `project_name`
- `project_path`
- Normalize the project root and derive a stable, filename-safe `project_id`.
- Persist the project context in daily-note frontmatter while keeping the existing `daily//.md` organization.
- Carry project context through Auto Dream extraction for procedure units.
- Store project-specific procedures under:
- `digest/procedure/projects//.md`
- Keep existing flat procedure nodes as global procedures:
- `digest/procedure/.md`
- Scope procedure deduplication and recall to the current project plus global procedures, excluding procedures from other projects.
- Update the QwenPaw, Codex, and Claude Code integrations to pass their current repository/project root when invoking memory recording.
- Preserve backward compatibility for callers that do not provide project context.

## Expected Behavior

- Project-specific build steps, debugging experience, repository conventions, and runbooks remain isolated under the originating project.
- Procedures explicitly identified as reusable across projects may still be integrated into the existing global procedure namespace.
- Daily memory remains organized by date and session ID.
- `digest/wiki/` remains a global knowledge namespace and does not gain project subdirectories.

## Out of Scope

- Reorganizing daily notes by project.
- Adding project-specific namespaces under `digest/wiki/`.
- Treating project name alone as a stable identity; duplicate project names must remain distinguishable.